dom/smil/nsSMILCSSValueType.h@97036ab72558 (annotated)
dom/smil/nsSMILCSSValueType.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | /* representation of a value for a SMIL-animated CSS property */ |
| michael@0 | 7 | |
| michael@0 | 8 | #ifndef NS_SMILCSSVALUETYPE_H_ |
| michael@0 | 9 | #define NS_SMILCSSVALUETYPE_H_ |
| michael@0 | 10 | |
| michael@0 | 11 | #include "nsISMILType.h" |
| michael@0 | 12 | #include "nsCSSProperty.h" |
| michael@0 | 13 | #include "mozilla/Attributes.h" |
| michael@0 | 14 | |
| michael@0 | 15 | class nsAString; |
| michael@0 | 16 | |
| michael@0 | 17 | namespace mozilla { |
| michael@0 | 18 | namespace dom { |
| michael@0 | 19 | class Element; |
| michael@0 | 20 | } // namespace dom |
| michael@0 | 21 | } // namespace mozilla |
| michael@0 | 22 | |
| michael@0 | 23 | /* |
| michael@0 | 24 | * nsSMILCSSValueType: Represents a SMIL-animated CSS value. |
| michael@0 | 25 | */ |
| michael@0 | 26 | class nsSMILCSSValueType : public nsISMILType |
| michael@0 | 27 | { |
| michael@0 | 28 | public: |
| michael@0 | 29 | typedef mozilla::dom::Element Element; |
| michael@0 | 30 | |
| michael@0 | 31 | // Singleton for nsSMILValue objects to hold onto. |
| michael@0 | 32 | static nsSMILCSSValueType sSingleton; |
| michael@0 | 33 | |
| michael@0 | 34 | protected: |
| michael@0 | 35 | // nsISMILType Methods |
| michael@0 | 36 | // ------------------- |
| michael@0 | 37 | virtual void Init(nsSMILValue& aValue) const MOZ_OVERRIDE; |
| michael@0 | 38 | virtual void Destroy(nsSMILValue&) const MOZ_OVERRIDE; |
| michael@0 | 39 | virtual nsresult Assign(nsSMILValue& aDest, |
| michael@0 | 40 | const nsSMILValue& aSrc) const MOZ_OVERRIDE; |
| michael@0 | 41 | virtual bool IsEqual(const nsSMILValue& aLeft, |
| michael@0 | 42 | const nsSMILValue& aRight) const MOZ_OVERRIDE; |
| michael@0 | 43 | virtual nsresult Add(nsSMILValue& aDest, |
| michael@0 | 44 | const nsSMILValue& aValueToAdd, |
| michael@0 | 45 | uint32_t aCount) const MOZ_OVERRIDE; |
| michael@0 | 46 | virtual nsresult ComputeDistance(const nsSMILValue& aFrom, |
| michael@0 | 47 | const nsSMILValue& aTo, |
| michael@0 | 48 | double& aDistance) const MOZ_OVERRIDE; |
| michael@0 | 49 | virtual nsresult Interpolate(const nsSMILValue& aStartVal, |
| michael@0 | 50 | const nsSMILValue& aEndVal, |
| michael@0 | 51 | double aUnitDistance, |
| michael@0 | 52 | nsSMILValue& aResult) const MOZ_OVERRIDE; |
| michael@0 | 53 | |
| michael@0 | 54 | public: |
| michael@0 | 55 | // Helper Methods |
| michael@0 | 56 | // -------------- |
| michael@0 | 57 | /** |
| michael@0 | 58 | * Sets up the given nsSMILValue to represent the given string value. The |
| michael@0 | 59 | * string is interpreted as a value for the given property on the given |
| michael@0 | 60 | * element. |
| michael@0 | 61 | * |
| michael@0 | 62 | * On failure, this method leaves aValue.mType == nsSMILNullType::sSingleton. |
| michael@0 | 63 | * Otherwise, this method leaves aValue.mType == this class's singleton. |
| michael@0 | 64 | * |
| michael@0 | 65 | * @param aPropID The property for which we're parsing a value. |
| michael@0 | 66 | * @param aTargetElement The target element to whom the property/value |
| michael@0 | 67 | * setting applies. |
| michael@0 | 68 | * @param aString The string to be parsed as a CSS value. |
| michael@0 | 69 | * @param [out] aValue The nsSMILValue to be populated. Should |
| michael@0 | 70 | * initially be null-typed. |
| michael@0 | 71 | * @param [out] aIsContextSensitive Set to true if |aString| may produce |
| michael@0 | 72 | * a different |aValue| depending on other |
| michael@0 | 73 | * CSS properties on |aTargetElement| |
| michael@0 | 74 | * or its ancestors (e.g. 'inherit). |
| michael@0 | 75 | * false otherwise. May be nullptr. |
| michael@0 | 76 | * Not set if the method fails. |
| michael@0 | 77 | * @pre aValue.IsNull() |
| michael@0 | 78 | * @post aValue.IsNull() || aValue.mType == nsSMILCSSValueType::sSingleton |
| michael@0 | 79 | */ |
| michael@0 | 80 | static void ValueFromString(nsCSSProperty aPropID, |
| michael@0 | 81 | Element* aTargetElement, |
| michael@0 | 82 | const nsAString& aString, |
| michael@0 | 83 | nsSMILValue& aValue, |
| michael@0 | 84 | bool* aIsContextSensitive); |
| michael@0 | 85 | |
| michael@0 | 86 | /** |
| michael@0 | 87 | * Creates a string representation of the given nsSMILValue. |
| michael@0 | 88 | * |
| michael@0 | 89 | * Note: aValue is expected to be of this type (that is, it's expected to |
| michael@0 | 90 | * have been initialized by nsSMILCSSValueType::sSingleton). If aValue is a |
| michael@0 | 91 | * freshly-initialized value, this method will succeed, though the resulting |
| michael@0 | 92 | * string will be empty. |
| michael@0 | 93 | * |
| michael@0 | 94 | * @param aValue The nsSMILValue to be converted into a string. |
| michael@0 | 95 | * @param [out] aString The string to be populated with the given value. |
| michael@0 | 96 | * @return true on success, false on failure. |
| michael@0 | 97 | */ |
| michael@0 | 98 | static bool ValueToString(const nsSMILValue& aValue, nsAString& aString); |
| michael@0 | 99 | |
| michael@0 | 100 | private: |
| michael@0 | 101 | // Private constructor: prevent instances beyond my singleton. |
| michael@0 | 102 | MOZ_CONSTEXPR nsSMILCSSValueType() {} |
| michael@0 | 103 | }; |
| michael@0 | 104 | |
| michael@0 | 105 | #endif // NS_SMILCSSVALUETYPE_H_ |
